PrestaShop How to add SKU MPN GTIN Products information

Got it 👍 This is a very common (and important) requirement for PrestaShop—especially for Google Merchant / SEO / structured data.

I’ll break it down cleanly 👇

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1️⃣ What are SKU, MPN, GTIN in PrestaShop?

Field	Meaning	Used for
SKU	Stock Keeping Unit	Internal product tracking
MPN	Manufacturer Part Number	Google Shopping, Schema
GTIN	Global Trade Item Number (EAN / UPC / ISBN)	Google, Rich snippets

👉 In PrestaShop:

• SKU = Reference
• GTIN = EAN-13 / UPC / ISBN
• MPN = NOT available by default (needs customization)

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2️⃣ How to Add SKU (Reference)

Admin path:

Back Office → Catalog → Products → Edit product

➡️ Go to Options / Stock / Details tab (varies by version)

• Reference → This is your SKU
• Can be set per combination also

✅ Already built-in – no extra module needed.

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3️⃣ How to Add GTIN (EAN / UPC / ISBN)

PrestaShop already supports GTIN fields 👇

Admin path:

Catalog → Products → Edit → Options

Available fields:

• EAN-13 → GTIN-13
• UPC → GTIN-12
• ISBN → Books only

💡 Google accepts any ONE GTIN.

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4️⃣ How to Add MPN (Manufacturer Part Number)

❌ PrestaShop does NOT have MPN by default
✅ You must add it manually (3 ways)

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🔹 Option A: Use a Module (Easiest)

Search in Addons marketplace:

• “MPN Product Field”
• “Extra Product Fields”
• “Google Merchant Center modules”

These modules:

• Add MPN field in product page
• Support combinations
• Automatically inject into schema

✔ Best if you don’t want coding

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🔹 Option B: Add MPN as a Product Feature (No Code)

Back Office → Catalog → Attributes & Features → Features

1. Add new feature:
   • Name: MPN
2. Assign value per product

❗ Downside:

• Not ideal for Google schema unless you customize theme
• Treated as descriptive data, not technical

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🔹 Option C: Add Custom Database Field (Best / Advanced)

Add MPN as a real product field.

1️⃣ Database

ALTER TABLE ps_product ADD mpn VARCHAR(64);

2️⃣ Override Product class

/override/classes/Product.php

public $mpn;

public static $definition = array(
    'table' => 'product',
    'primary' => 'id_product',
    'fields' => array(
        'mpn' => array('type' => self::TYPE_STRING, 'size' => 64),
    ),
);

3️⃣ Add input field in admin product form

(override AdminProductsController)

⚠️ Needs override index rebuild:

Advanced Parameters → Performance → Clear cache

✔ Best for:

• Google Merchant
• JSON-LD schema
• Multi-language not required

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5️⃣ Showing SKU / MPN / GTIN on Product Page

Edit your theme file:

📄 themes/your-theme/templates/catalog/product.tpl

Example:

{if $product.reference}
<p><strong>SKU:</strong> {$product.reference}</p>
{/if}

{if $product.ean13}
<p><strong>GTIN:</strong> {$product.ean13}</p>
{/if}

{if $product.mpn}
<p><strong>MPN:</strong> {$product.mpn}</p>
{/if}

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6️⃣ Adding SKU, MPN, GTIN in JSON-LD (Very Important)

Since you care about schemas (I remember 😉), this is crucial.

Example Product Schema:

"sku": "SKU123",
"mpn": "MPN-456",
"gtin13": "8901234567890"

In PrestaShop theme:
📄 templates/_partials/microdata-jsonld.tpl

Make sure:

• sku → reference
• mpn → custom field
• gtin13 / gtin12 → ean13 / upc

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7️⃣ Google Merchant Rules (Important)

Condition	What to send
GTIN exists	Send gtin only
No GTIN	Send mpn + brand
Custom product	Use identifier_exists = no

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8️⃣ Best Practice (Recommended Setup)

✔ SKU → Reference
✔ GTIN → EAN-13 / UPC
✔ MPN → Custom field (Option C)
✔ Brand → Manufacturer
✔ Schema JSON-LD → Enabled

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